just change
you can't
To remove the Earth Astro Knight costume on Poptropica, simply click on the "Costume" icon in the top menu bar, then click on the Earth Astro Knight costume to deselect it. This will revert your character back to its original appearance.
you don't inless you buy it
The costume collector, when it was available, would store three of your "costumes" or appearances that you could switch between. Now there are ready-made costumes at the Store that are put-on/take-off like the Collector.
The costume comes off when it goes to sleep :)
The Zomberry costume effect is a card in your store items, and reverts to normal by selecting "take off." If you get zombified in the Bonus Quest, you have to try again.
If you purchased it in the Poptropica Store, it will come on and off (select "purchased items" on the menu). If you get one at the Costume Store on Super Power Island, then you will have to find someone with another article of clothing to swap with. (Use the costumizer feature, anywhere but on Big Nate Island.)
you first go to Ned noodle head the nerd.then you click customizer and click on the nerd.then just copy off of him tada.
Poptropica characters are made to swap and buy clothes. Poptropica characters must have clothes covering both top and bottom. Unless you find somone who's not wearing a shirt, a shirt must stay on.
click on it.
the bow and arrows are in the armory off of the great hall to the left
you can only take it off when you have a type of costume on